enamel
tooth enamel

This may also cause the tooth enamel to become rough.

Tooth enamel is the strongest substance in the human body.

The hard tooth enamel cut through the softer bone, but only slowly.

In five years the stomach acid would eat through her tooth enamel, if she didn't drop dead first.

Tooth enamel contains trace elements which show where they grew.

Some recent studies have singled out sports drinks as a particular threat to tooth enamel.

As we age, the outer layer of tooth enamel wears away.

Tooth enamel is the hardest substance manufactured in the human body.

And now he has turned his attention to tooth enamel, one of the most active fields in biological research on the body's hard tissues.

This medication may cause the tooth enamel to become discolored.